A lesser-known name for the American Civil War is the War of Northern Aggression.
One friend commented that a great way to make people do a double-take is to use that term in conversation. It doesn’t matter that you’re not a Confederate sympathiser. The goal is the irony! Try making it a game: players earn points inversely proportional to their location’s geographic latitude. Brownsville, Texas = 0; Bangor, Maine = 99.